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Self-Organized Periodic Photonic Structure in a Nonchiral Liquid Crystal
Sambles, J. Roy
Stewart, I. W.
University of Exeter; University of Strathclyde
Physical Review Letters
American Physical Society
A hybrid-aligned cell of the smectic A liquid material 8CB gives two stable director configurations, one of which is periodic and gives strong diffraction of light. This photonic lattice director profile arises from “frustration” caused by conflicting constraints imposed by the boundary conditions and the constant amplitude smectic density wave. A model is proposed which accords well with the experiment results, predicting correctly the dependence of the periodicity on the cell thickness and reproducing optical polarization microscopy results.
Lizhen Ruan, J. Roy Sambles, and I. W. Stewart, Physical Review Letters, Vol. 91, article 033901 (2003). "Copyright © 2003 by the American Physical Society."
91 (3), article 033901